29/25 PET Preform Mold Production Process and Quality Control
Stable Injection Molding Process
Utilizing mature injection molding process parameters, temperature, pressure, and molding cycle are monitored throughout the entire process, ensuring stable dimensions and consistent molding for every 29/25 bottle preform.
Precise Control of Wall Thickness and Crystallinity
Through dual optimization of mold and process, uniform wall thickness distribution and reasonable crystallinity are maintained, improving blow molding stability and reducing deformation and defect rates.


Full-Process Online Inspection
From raw material entry and injection molding to finished product off-line, every process is inspected, and unqualified bottle preforms are removed in real time, ensuring product quality.
Reduced Filling and Sealing Risks
The highly consistent bottle neck and structural design ensure stable matching with 29/25 bottle caps, effectively reducing leakage and downtime risks during the filling process.
29/25 PET Preform Mold Materials and Safety
Food-Grade PET Raw Material
Made with high-quality food-grade PET, each batch of raw material is tested upon arrival to ensure consistent purity and suitability for long-term food contact.
BPA-Free, Safe and Reliable
The raw material itself is BPA-free, controlling safety risks from the source and meeting the health and compliance requirements for beverage and food packaging.
Complies with International Food Contact Standards
The production process strictly adheres to FDA and EU food contact regulations, with quality and safety checks at every stage to ensure compliance before shipment.
Suitable for Various Beverage Packaging
Widely used for bottled water, mineral water, functional beverages, and other liquid drinks, providing safety and stability, and compatible with high-speed filling and blow molding production lines.
Reliable 29/25 PET Preform Mold Factory
Customer Satisfaction at the Core
Customer satisfaction is always the standard by which we measure our work. From needs communication and sample confirmation to mass production and delivery, the entire process is guided by the customer's actual user experience.
Advanced Technology, Complete Manufacturing System
Our production base is equipped with mature injection molding and testing equipment, possessing integrated production capabilities from mold design and injection molding to quality inspection, ensuring the stable quality of PET preform molds.
Stable Delivery, Long-Term Cooperation
Through standardized production and strict quality control, we guarantee batch consistency, helping customers reduce filling risks and establishing long-term and reliable cooperative relationships.

FAQ
Q: Which bottle caps and filling lines are compatible with the 29/25 PET Preform?
A: The 29/25 neck finish is a common standard specification, compatible with most mainstream 29mm bottle caps and most mineral water and beverage filling lines. Strict control of neck finish precision and consistency effectively reduces leakage and downtime.
Q: Do you support custom PET Preform mold design?
A: We specialize in custom PET Preform mold design. We can configure the mold structure and cavity count based on the customer's bottle design, weight requirements, blowing equipment, and production capacity targets. The entire process, from design and processing to mold testing, undergoes rigorous inspection to ensure stable mold operation and consistent preform dimensions.
Q: Which injection molding machines and production scales are suitable for your PET Preform molds?
A: The molds can be designed to match the customer's existing injection molding machine brand, clamping force, and production cycle. They support multi-cavity configurations and are suitable for medium to high-volume continuous production, ensuring stable operation.
Q: What technical standards are used for the neck finish, core, and cavity of your PET Preform molds?
A: Both the neck finish and core are made of stainless steel, with fine surface treatment and wear-resistant coating technology to effectively improve service life and molding stability. The cavity is made of stainless steel, and the molding contour uses a mirror polishing process to ensure the surface finish and smooth demolding of the preforms, meeting the needs of long-term stable production.
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